Reverberatory ore-furnace



(No Model.) 2 Sheets-Sheet- 1. G. W. JONES.

. REVERBBRATORY ORE FURNACE. N0."295,646. Patented M r. 2 5

2 Sheets-Sheet 2.

W. JONES.- REVERBERATORYQRE FURNACE.

(No Model.)

No. 295,646; Patented Mar.- Z5,1884.'

wiuh most advantageous manner.

, connected with the chamber or chambers 'atory furnaces fordesulphurizing, chloridiz- UNITE STATES PATENT Fries.

GEORGE IV. JONES, OF SILVER GREEK, ASSIGNOR 'lO ADAMS 8t CARTER, OF

i SAN FRANCISCO, CALIFORNIA.

REVERBERATORY ORE-FURNACE.

SPECIFICATION forming part of Letters Patent No. 295,646, dated March25, 1884..

Application filmlsoptember 7, 1883. (No model.)

To all whom it may concern:

Be it known that I, GEORGE WV. JONES, of SilverCreek, Alpine county, andState of California, have invented an Improvement in ReverberatoryOre-Furnaces; and I hereby declare the following to be a full, clear,and exact description thereof.

My invention relates to a class of reverbering, and chlorinating ores,and to certain new and useful improvements therein, the object of whichis to thoroughly work the ore in the These improvements consist in suchan arrangement of hearths that the ore may be roasted in a chamber, fromwhich the fumes of the chlorine are excluded, but which is so whereinthe chloridation or chlorination is effected that charges of ore may bewithdrawn from itinto said chambers. Further, in thearrangement of anumber of furnaces to provide for a track upon the top to facilitate thecharging of the whole with ore; in the arrangement of the varioushearths and their doors to permit the simultaneous and independentmanipulation of the ore within all the hearths; in a peculiardust-chamber, and in minor details of construction, all of which I shallhereinafter fully explain.

Referring to the accompanying drawings, Figure l is a front elevation ofmy furnace. Fig. 2 is a vertical transverse section of same. Fig. 3 is avertical section of the arch D, stack D, and dust-chamber I. Fig. 4 is avertical longitudinal section of my furnace. Fig. 5 is a horizontallongitudinal section through the lower hearth, a.

A isthe brick-work forming the shell of the furnace or furnaces, ofwhich I have here shown four built together as one. A description of theinterior of one will answer for all.

*A'lower hearth, a, is made, a central hearth, a, and atop hearth, b,Fig. 4. These are made by brick diaphragms, and it will be ob servedthat the one, B, separating the hearths a and a is very wide. Thehearths a a are connected at their ends opposite the fire-chamber by apassage, 0.

0 is the fire box or chamber for the lower l the lower hearths,

two hearths, and O is a separate fire-box for the upper hearth, b. Theescape-flue d for the hearth a extends upward past the end of hearth b,but is entirely separate therefrom, being inclosed, whereby none of theescaping products will find their way into hearthb.

. The escape-flue for hearth bis (1 at its farther end. These escapeflues extend upwardly, and are inclosed in the arch D, Figs. 1, 2, 3,from which a common stack or stacks, D, open out, Fig. 3. In the floorof each of the hearths are the traps e, for letting the charge down intoand through each hearth, and finally onto the floor beneath.

Through the top of the furnace aremade apertures, in which are hoppersE, for feeding the ore. I may explain the advantage of this constructionas follows:

Ores designed for treatment in this furnace are those containingsulphur. It is necessary to roast the ore in order to drive off the sul-I phur, that the chlorine may have better effect; but I have found thatsuch a high degree of heat is required for the process of desulphurizing that when the chlorine is put in it has a tendency to volatilizethe precious metals, and thus a great loss is suffered; but in myfurnace the chlorine which is introduced only in and which acts upon theore in the lower hearths alone, is excluded from the ore undergoingdesulphurization in the upper hearth, in which nothing but the roastinggoes on. When that is complete, the charge of ore is let down throughthe traps into the hearth a, and thence into hearth a, in both of whichit is subjected to the chlorine, being then in a condition free ofsulphur.

The ,separate fire-boxesprovide for the requisite heat in each hearth,though the hearths may be so arranged as to be heated from a singlefire-box.

It will be observed that each furnace is so built with respect to theadjoining ones that the fire-boxes lie close together for convenience inworking. I may have as many furnaces as I desire.

Upon top of the furnace throughout its extent is a track, f, upon whichsmall ore-cars are adapted to run, bearing their loads to eachfeed-hopper, Fig. 2. The workmen are protected when running the car bythe arch D,

Y which carries the escaping gases above them. vF are the doors of thelower hearths, (4, Figs.

1, 2. ll" are the doors of the hearth a, Fig. 2. These are located onthe side of the furnace opposite to doors F. G are the doors of hearthb, and are upon the same side as doors 1?, Figs. 1, 2. The workmen whooperate through doors F stand on the ground. Those operating throughdoors G stand on a platform, H, over the lower workmen. Those workingthrough doors F stand on the opposite side of the furnace on a platformor raised ground. By locating doors F and F on opposite sidesinterference of the workmen is avoided, and by making the partition Bwide, as I have shown, the doors G are raised high enough to permit theconstruction of the platform H sufiieiently high to allow men to workover each other on the same side of the furnace.

The brick-work forming arch D is carried up straight on its outer sides,and above the arch the inner walls of the escape-fines are alsoextended, and are straight, as shown in Fig. 8, whereby a dust-chamber,I, is formed. Where the two branches of the escape-fines unite in thecommon stack D the outer walls are curved downwardly and inwardly toform a dead-air space in the dust-ehamber. The

heavy particles settle down in the chamber, and are removed through door'6 while the gases pass off through the stack.

Having thus described 1n yinvention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a desulphurizing, chloridizing, and

chlorinating furnace, the connected hearths a a, having the escape-flue(Z, and the fire-box G, in combination with the hearth I), havingescape-flue d, and fire-box O, and the traps c, connecting it withhearth a, substantially as herein described.

2. In a desulphurizing, chloridizing, and ehlorinating furnace, two ormore furnaces built in one connected line, and having an arch, D, inwhich the escape-fines are contained, and top openings with feed-hoppersE, in combination with the track f on top of said furnaces and inclosedby the arch, substantially as andfor the purpose herein described.

3. In a desulphurizing, chloridizing, and chlorinating furnace, theconnected hearths a a, having escape-fine (Z, and the top hearth, I),having the escape-flue d, and the feed-hoppers E on top of the furnace,in combination with the arch D, inclosing the escape-fines, the stack D,and the track f on top of the furnace, substantially as and for thepurpose herein described.

4-. In a desulphurizing, chloridizing, and ehlorinating furnace, thearch D, and the escape-flues (Z d from the furnace, in combination withthe dust-chamber I, formed above said areh and the smoke-stack D,substantially as herein described.

In witness whereof I have hereunto set my hand.

GEORGE XV. JONES.

IVitnesses:

FRED. J. BAILEY, EDwD. H. J oNns.

